CVE-2026-43123 Details
Description
In the Linux kernel, the following vulnerability has been resolved: fbcon: check return value of con2fb_acquire_newinfo() If fbcon_open() fails when called from con2fb_acquire_newinfo() then info->fbcon_par pointer remains NULL which is later dereferenced. Add check for return value of the function con2fb_acquire_newinfo() to avoid it. Found by Linux Verification Center (linuxtesting.org) with SVACE.
A vulnerability exists in the Linux kernel's framebuffer console (fbcon) management. When the function fbcon_open() is called from con2fb_acquire_newinfo(), it can fail, leaving the fbcon_par pointer as NULL. This NULL pointer is later dereferenced, leading to potential issues. The vulnerability has been addressed by adding a check for the return value of con2fb_acquire_newinfo() to prevent the NULL dereference. This issue was identified by the Linux Verification Center using SVACE.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544 | kernel.org | Patch |
| https://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc | kernel.org | Patch |
| https://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959 | kernel.org | Patch |
| https://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0c | kernel.org | Patch |
| https://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2c | kernel.org | Patch |
| https://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59f | kernel.org | Patch |
| https://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.23, < 5.15.203 >= 5.16, < 6.1.165 >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.16 >= 6.19, < 6.19.6 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 12, 2026 | Initial Analysis | [email protected] |
| May 6, 2026 | New CVE Received | kernel.org |